940321

Lithium sulfide

99.995% trace metals basis (basis), low sodium, battery grade

• Synonym(s): Dilithium monosulfide, Dilithium sulfide
• Empirical Formula (Hill Notation): Li₂S
• CAS Number: 12136-58-2
• Molecular Weight: 45.95
• MDL number: MFCD00011085
• UNSPSC Code: 12352300

Properties

• grade: battery grade
• description: application(s): battery manufacturing
• Assay: 99.995% trace metals basis (basis)
• form: powder
• mol wt: 45.95
• composition: Li₂S
• particle size: 100 mesh
• bp: 1,372 °C ((lit.))
• mp: 900-975 °C
• solubility: soluble (reacts with water)
• density: 1.66 g/mL at 25 °C (lit.)
• cation traces: Na: <35 ppm
• storage temp.: 2-8°C
• SMILES string: [Li]S[Li]
• InChI: 1S/2Li.S
• InChI key: ZWDBUTFCWLVLCQ-UHFFFAOYSA-N

Description

General description

Lithium sulfide (Li₂S) is a high-purity, inorganic compound that appears as a white to yellowish crystalline powder. It has a molecular weight of 45.95 g/mol and a density of 1.66 g/cm³. Lithium sulfide is known for its strong nucleophilic properties and its ability to react readily with water to produce lithium hydroxide and hydrogen sulfide gas. It is also soluble in certain organic solvents, such as pyridine and dimethyl sulfoxide. Lithium sulfide crystallizes in an antifluorite structure and melts in the temperature range of 900-975°C. Our high-purity material (99.995% trace metals) is specifically formulated for low sodium content, with less than 35 ppm of sodium metal. Additionally, the material is passed through a 100 mesh sieve, ensuring that most particles are less than 150 microns in size.

Application

High-purity lithium sulfide is primarily used as a precursor in the synthesis of other lithium compounds. In chemical manufacturing, it acts as a precursor for lithium hydride, lithium borohydride, lithium amide, lithium thioacetate, lithium tetrafluoroborate, and others. In the battery industry, our battery grade lithium sulfide is used as a precursor to synthesize sulfide-based solid electrolytes like Li₃PS₄ ([https://www.sigmaaldrich.com/US/en/product/aldrich/916374]), Li₆PS₅Cl ([https://www.sigmaaldrich.com/US/en/product/aldrich/916137]), and Li₁₀SnP₂S₁₂ ([https://www.sigmaaldrich.com/US/en/product/aldrich/915114]). Lithium sulfide also serves as a cathode material in lithium-sulfur batteries, offering a theoretical capacity of up to 1166 mAh/g, nearly four times that of lithium cobalt oxide. This makes it an attractive candidate for next-generation battery technologies. Additionally, lithium sulfide is valuable in the semiconductor industry for the production of thin-film transistors (TFTs) and other electronic devices, particularly lithium sulfide-phosphorus oxide (Li₂S-P₂O₅) TFTs.

Features and Benefits

Higher Purity (99.995%): Ensures minimal trace metal contamination, making it ideal for applications requiring high-purity materials.
Low Sodium Content: Specifically formulated for low sodium content (<35 ppm) to meet the stringent requirements of sensitive applications.
Controlled Particle Size: Passed through a 100 mesh sieve, ensuring most particles are less than 150 microns, which is crucial for consistent performance in various applications.

Safety Information

• Pictograms: GHS06,GHS05
• Signal Word: Danger
• Hazard Statements: H301,H314
• Precautionary Statements: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363
• Hazard Classifications: Acute Tox. 3 Oral - Eye Dam. 1 - Skin Corr. 1B
• Storage Class Code: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable